Anxiety, memory problems and poor health also play a role, study suggests

Researchers recommend improving needle quality

Vaccine Pellets for Mice Show Promise In Curbing Lyme Disease Imbruvica Approved for Treatment of Chronic Lymphocytic Leukemia: FDA

Questions you should ask your doctor

Wear lots of layers

About one-quarter of those signed up are now young adults, report shows

Symptoms improved and fewer patients experienced disease progression

Disease spread was detected and treated sooner, with better survival in patients who received 'sentinel node' biopsy

British researchers say dogs bred for size can have malformed brains and skulls

Researchers find those with brain stem injury are more likely to develop the condition